CVEvulnerability

CVE-2020-8843

7.4 HIGH Published 2020-02-14 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-02-14
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0 ([email protected])
5.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:N
Weaknesses
CWE-20

Description

An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.

Affected configurations

• istio istio (>= 1.3.0 <= 1.3.6)

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References